CN105818679A - Independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system - Google Patents
Independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system Download PDFInfo
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- CN105818679A CN105818679A CN201610182490.0A CN201610182490A CN105818679A CN 105818679 A CN105818679 A CN 105818679A CN 201610182490 A CN201610182490 A CN 201610182490A CN 105818679 A CN105818679 A CN 105818679A
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- control valve
- directional control
- solenoid directional
- fixed displacement
- displacement motor
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
Abstract
The invention relates to an independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system and belongs to hydraulic drive systems of independent drive off-road wheeled vehicles. The independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system comprises a variable pump, a filter, a hydraulic oil tank and shunts, which are connected between the variable pump and constant displacement motors through two-position three-way electromagnetic directional valves and three-position four-way electromagnetic directional valves, and hydraulic energy is converted into mechanical energy to be transmitted to wheels, to drive the vehicle. The independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system has the advantages that the structure is novel, different drive modes of low-speed four-wheel drive, moderate-speed four-wheel drive and high-speed four-wheel drive are realized through switching the multiple electromagnetic directional valves, and the independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system can be applied to drive systems being large in speed regulation range, high in reliability, low in cost and lower in oil liquid requirement.
Description
Technical field
The invention belongs to a kind of independent fluid power system driving cross-country wheel type vehicle, be applied to that speed adjustable range is big, reliability is high, in low cost, the drive system relatively low to fluid requirement.
Background technology
Hydrostatic drive system is a kind of flexible transmission system, Just because of this, and impact that its absorbable equipment brings and overload, thus extend engine life.Owing to its flexibility characteristics and energy secondary are changed, (mechanical energy is hydraulic energy to hydrostatic drive system by pump, hydraulic energy is changed into mechanical energy again by motor), make its transmission efficiency less than machine driving, but in the case of power is certain, pump and motor have multiple combination pattern such that it is able to realize electrodeless variable-speed.The product of transmission power N=PQ of hydrostatic drive system, i.e. flow and pressure, its invariable power curve is hyperbola, is mated by the power curve with electromotor, so that transmission efficiency improves.As far back as the mid-50, Britain has begun to the hydrostatic drive research of tractor, and the country such as the following U.S., West Germany, China has started research one after another, is successively used in the fields such as military's tactical vehicle, farm machinery, aircraft hitching machinery.
Owing to offroad vehicle needs to adapt to complicated non-structural landform, therefore the velocity mode in its driving process is required higher, higher speed is being needed by the preferable road surface of property, and the speed of low-speed stable it is accomplished by landform complicated and changeable, in addition, it is contemplated that in driving process during the wheel ground attaching coefficient difference of vehicle both sides, as there is skidding certain side, at this moment vehicle cannot straight-line travelling, these are all the need for suitable hydrostatic drive system to meet correct driving requirements.
Summary of the invention
The present invention provides a kind of many wheels multi-mode closed-loop hydrostatic drive system based on independent driving wheel-type vehicle, it is therefore intended that meet the independent driving requirements driving cross-country wheel type vehicle.
nullThe present invention adopts the technical scheme that: the A mouth of variable pump is connected in the entrance of solenoid directional control valve one，The B mouth of variable pump is connected in the outlet of filter，Hydraulic oil container outlet is connected in the entrance of filter，The outlet of solenoid directional control valve one is respectively connected to entrance and the entrance of solenoid directional control valve six of diverter，The outlet of diverter is respectively connected to entrance and the entrance of solenoid directional control valve seven of solenoid directional control valve six，The outlet of solenoid directional control valve six is respectively connected to fixed displacement motor one、Fixed displacement motor two and the two ends of solenoid directional control valve two，The outlet of solenoid directional control valve seven is respectively connected to fixed displacement motor three、Fixed displacement motor four and the two ends of solenoid directional control valve three，Accumulator one is connected with fixed displacement motor one，Accumulator two is connected with fixed displacement motor two，Accumulator three is connected with fixed displacement motor three，Accumulator four is connected with fixed displacement motor four，Solenoid directional control valve six is connected with solenoid directional control valve seven，The B mouth of variable pump is connected in the entrance of solenoid directional control valve four，Two outlets of solenoid directional control valve four are respectively connected to two mouthfuls of solenoid directional control valve seven，The entrance of solenoid directional control valve five is connected in an outlet of diverter，Damping hole one、Damping hole two is connected with another outlet of diverter；
Described variable pump is used for connecting drive system, it is provided that flow, can be operated in driving condition and on-position；
Described solenoid directional control valve one, solenoid directional control valve two, solenoid directional control valve three, solenoid directional control valve four are two-bit triplet solenoid directional control valve respectively；
Described solenoid directional control valve five, solenoid directional control valve six, solenoid directional control valve seven use three-position four-way electromagnetic directional valve；
Described diverter is connected between the motor of both sides, is used for realizing assignment of traffic；
Described fixed displacement motor one, fixed displacement motor two, fixed displacement motor three, fixed displacement motor four are respectively used to connect wheel, are mechanical energy by hydraulic energy transfer.
The method have the advantages that by utilizing variable pump that for hydraulic energy, the changes mechanical energy that electromotor exports is flowed to fixed displacement motor, thus be converted into mechanical energy and be delivered to wheel, and then driving vehicle, the most each wheel directly drives with a fixed displacement motor, different drive patterns is realized: low speed 4 wheel driven by the switching of multiple solenoid directional control valves, middling speed 4 wheel driven, high speed 4 wheel driven, it is applied to speed adjustable range big, reliability is high, low cost, fluid is required in relatively low drive system, the present invention takes to install different size of damping hole between the fixed displacement motor of both sides to realize the reasonable distribution of flow, realize pull strength Balance route in vehicle travel process, thus solve slippage problems, realize straight-line travelling.
Accompanying drawing explanation
Fig. 1 is the system diagram of the present invention.
Detailed description of the invention
nullThe A mouth of variable pump 1 is connected in the entrance of solenoid directional control valve 1，The B mouth of variable pump 1 is connected in the outlet of filter 18，Hydraulic oil container 19 outlet is connected in the entrance of filter 18，The outlet of solenoid directional control valve 1 is respectively connected to entrance and the entrance of solenoid directional control valve 65 of diverter 3，The outlet of diverter 3 is respectively connected to entrance and the entrance of solenoid directional control valve 7 11 of solenoid directional control valve 65，The outlet of solenoid directional control valve 65 is respectively connected to fixed displacement motor 1、Fixed displacement motor 28 and the two ends of solenoid directional control valve 26，The outlet of solenoid directional control valve 7 11 is respectively connected to fixed displacement motor 3 13、Fixed displacement motor 4 14 and the two ends of solenoid directional control valve 3 12，Accumulator 1 is connected with fixed displacement motor 1，Accumulator 2 10 is connected with fixed displacement motor 28，Accumulator 3 15 is connected with fixed displacement motor 3 13，Accumulator 4 16 is connected with fixed displacement motor 4 14，Solenoid directional control valve 65 is connected with solenoid directional control valve 7 11，The B mouth of variable pump 1 is connected in the entrance of solenoid directional control valve 4 17，Two outlets of solenoid directional control valve 4 17 are respectively connected to two mouthfuls of solenoid directional control valve 7 11，The entrance of solenoid directional control valve 54 is connected in an outlet of diverter 3，Damping hole 1、Damping hole 2 21 is connected with another outlet of diverter 3；
Described variable pump 1 is used for connecting drive system, it is provided that flow, can be operated in driving condition and on-position；
Described solenoid directional control valve 1, solenoid directional control valve 26, solenoid directional control valve 3 12, solenoid directional control valve 4 17 are two-bit triplet solenoid directional control valve respectively；
Described solenoid directional control valve 54, solenoid directional control valve 65, solenoid directional control valve 7 11 are respectively adopted three-position four-way electromagnetic directional valve；
Described diverter 3 is connected between the motor of both sides, is used for realizing assignment of traffic；
Described fixed displacement motor 1, fixed displacement motor 8, fixed displacement motor 13, fixed displacement motor 14 are connected between variable pump and wheel, are mechanical energy by hydraulic energy transfer；
Operation principle: be capable of low speed 4 wheel driven, middling speed 4 wheel driven, high speed 4 wheel driven, backward going and static pressure braking based on the independent many wheels multi-mode closed-loop hydrostatic drive system driving cross-country wheel type vehicle.Each drive pattern describes in detail as follows:
(1) low speed 4 wheel driven: electromotor provides power for variable pump, its flow is made to pass drive system by the A oral instructions of variable pump 1, flow is through reversal valve 2(electric magnet 1YA dead electricity) after flow into diverter 3, diverter 3 carries out equivalent distribution to reversal valve 2 flow, flow one tunnel after distribution obtains electric through reversal valve 5(electric magnet 5YA) separately flow into motor 7 and reversal valve 6(electric magnet 7YA dead electricity), reversal valve 6 flow flows into motor 8, the flow of motor 7 flows out to reversal valve 5 through reversal valve 6, and the flow of motor 8 flows directly out reversal valve 5.Another road flow after diverter 3 distributes obtains electric through reversal valve 11(electric magnet 8YA) separately flow into motor 13 and reversal valve 12(electric magnet 10YA dead electricity), reversal valve 12 flow flows into motor 14, the flow of motor 13 flows out to reversal valve 11 through reversal valve 12, and the flow of motor 14 flows directly out reversal valve 11.The flow that these four motors flow out flow to reversal valve 17(electric magnet 2YA dead electricity respectively through reversal valve 5 and reversal valve 11), thus flow back to the B mouth of variable pump.Being equivalent to four driving motors and be in parallel connection, the pressure oil of pump discharge is bisected into four tunnels by two diverters and two three position four-way electromagnetic valves, drives four hydraulic motors respectively.Under this operating mode, four hydraulic motor output torque maximums, but rotating speed is minimum, is suitable for the cross-country road conditions that the slope road of low-speed big driving is bigger.
(2) middling speed 4 wheel driven: electromotor provides power for variable pump, its flow is made to pass drive system by the A oral instructions of variable pump 1, flow is through reversal valve 2(electric magnet 1YA dead electricity) after flow into diverter 3, diverter 3 carries out equivalent distribution to reversal valve 2 flow, flow one tunnel after distribution obtains electric through reversal valve 5(electric magnet 5YA) flow into motor 7, pass through reversal valve 6(electric magnet 7YA and obtain electric) to motor 8, thus flow out to reversal valve 5.Another road flow after distribution obtains electric through reversal valve 11(electric magnet 8YA) flow into motor 13, pass through reversal valve 12(electric magnet 10YA and obtain electric) to motor 14, thus flow out to reversal valve 11.The traffic aggregation flowed out from reversal valve 5 and reversal valve 11 is by reversal valve 17(electric magnet 2YA dead electricity) flow back to the B mouth of variable pump.After being equivalent to the series connection of homonymy two motor in parallel again because the series connection of homonymy motor make the maximum differential pressure of each motor be reduced to the 1/2 of low speed 4 wheel driven, i.e. maximum drawbar pull be reduced to its 1/2.
(3) high speed 4 wheel driven: electromotor provides power for variable pump, its flow is made to pass drive system by the A oral instructions of variable pump 1, flow through reversal valve 2(electric magnet 1YA and obtain electric) obtain electric to reversal valve 5(electric magnet 5YA), and then obtain electric through reversal valve 6(electric magnet 7YA) flow through motor 7 and motor 8 successively, flow into reversal valve 11(electric magnet 9YA through reversal valve 5 again and obtain electric), and then obtain electric through reversal valve 12(electric magnet 10YA) flow through motor 13 and motor 14 the most successively, flowed into reversal valve 17(electric magnet 2YA by reversal valve 11 and obtain electric), thus flow back to the B mouth of variable pump.Being equivalent to four driving motors and be in series connection, pump discharge pressure oil flows through four motors successively, and now four hydraulic motor output torques are minimum, only the 1/4 of low speed 4 wheel driven scheme, but rotating speed is the highest, is suitable for smooth section.
(4) backward going: compared with forward travel, backward going is reversely to be realized by the flow flowing through motor.This hydrostatic drive system can realize reverse low speed 4 wheel driven, reverse middling speed 4 wheel driven and reverse high speed 4 wheel driven Three models.Wherein reversely the electric magnet 6YA of reversal valve 5 is only obtained electric compared with forward low speed 4 wheel driven by low speed 4 wheel driven, and the electric magnet 9YA of reversal valve 11 obtains electric；Same, the electric magnet 6YA of reversal valve 5 is only obtained electric compared with forward middling speed 4 wheel driven by reverse middling speed 4 wheel driven, and the electric magnet 9YA of reversal valve 11 obtains electric；Reversely high speed 4 wheel driven has two kinds of implementations, one only to obtain electric by the electric magnet 6YA of reversal valve 5 compared with forward high speed 4 wheel driven, and the electric magnet 8YA of reversal valve 11 obtains electric；Reversely the another kind of high speed 4 wheel driven is achieved in that and the swashplate angle of variable pump 1 is transformed to opposite direction, making its output flow is negative value, i.e. flow flows out from B mouth, flow through reversal valve 17(electric magnet 2YA and obtain electric) arrive reversal valve 11(electric magnet 9YA obtain electric), thus flow flows through fixed displacement motor 14 successively, reversal valve 12(electric magnet 10YA obtains electric) and fixed displacement motor 13, pass through reversal valve 11 and obtain electric to reversal valve 5(electric magnet 5YA), thus flow flows through fixed displacement motor 8 successively, reversal valve 6(electric magnet 7YA obtains electric) and fixed displacement motor 7, then flow through reversal valve 5 and obtain electric to reversal valve 2(electric magnet 1YA), thus flow back to the A mouth of variable pump 1 to drive vehicle backward going.
(5) static pressure braking: when the flow of variable pump 1 becomes 0, motor flow reflux enters variable pump, thus drives electromotor anti-dragged brake.
(6) pull strength Balance route: reversal valve 4, diverter 3 in drive system realize pull strength Balance route in the process of moving.The first damping hole 20 and break-make of the first damping hole 21 is changed by electric magnet 3YA and 4YA of switching three position four-way electromagnetic valve 4 so that it is be connected in parallel on the outlet two ends of diverter 3, it is achieved the assignment of traffic of both sides fixed displacement motor under the operating mode that both sides fixed displacement motor is in parallel.This control process is the most necessary, because for the wild environment that operating mode is complicated, uneven due to road surface, the path that each wheel was passed by within the same time is different, or the weight being assigned to each wheel is different, at this moment average mark streaming system may result in that vehicle is the most a certain or sliding phenomenon occurs dragging in several wheel, thus reduces car load propulsive efficiency.
Claims (6)
- null1. many wheels multi-mode closed-loop hydrostatic drive system based on independent driving wheel-type vehicle，It is characterized in that: the A mouth of variable pump is connected in the entrance of solenoid directional control valve one，The B mouth of variable pump is connected in the outlet of filter，Hydraulic oil container outlet is connected in the entrance of filter，The outlet of solenoid directional control valve one is respectively connected to entrance and the entrance of solenoid directional control valve six of diverter，The outlet of diverter is respectively connected to entrance and the entrance of solenoid directional control valve seven of solenoid directional control valve six，The outlet of solenoid directional control valve six is respectively connected to fixed displacement motor one、Fixed displacement motor two and the two ends of solenoid directional control valve two，The outlet of solenoid directional control valve seven is respectively connected to fixed displacement motor three、Fixed displacement motor four and the two ends of solenoid directional control valve three，Accumulator one is connected with fixed displacement motor one，Accumulator two is connected with fixed displacement motor two，Accumulator three is connected with fixed displacement motor three，Accumulator four is connected with fixed displacement motor four，Solenoid directional control valve six is connected with solenoid directional control valve seven，The B mouth of variable pump is connected in the entrance of solenoid directional control valve four，Two outlets of solenoid directional control valve four are respectively connected to two mouthfuls of solenoid directional control valve seven，The entrance of solenoid directional control valve five is connected in an outlet of diverter，Damping hole one、Damping hole two is connected with another outlet of diverter.
- A kind of many wheels multi-mode closed-loop hydrostatic drive system based on independent driving wheel-type vehicle the most according to claim 1, it is characterised in that: described variable pump is used for connecting drive system, it is provided that flow, can be operated in driving condition and on-position.
- A kind of many wheels multi-mode closed-loop hydrostatic drive system based on independent driving wheel-type vehicle the most according to claim 1, it is characterised in that: described solenoid directional control valve one, solenoid directional control valve two, solenoid directional control valve three, solenoid directional control valve four are two-bit triplet solenoid directional control valve respectively.
- A kind of many wheels multi-mode closed-loop hydrostatic drive system based on independent driving wheel-type vehicle the most according to claim 1, it is characterised in that: described solenoid directional control valve five, solenoid directional control valve six, solenoid directional control valve seven are respectively adopted three-position four-way electromagnetic directional valve.
- A kind of many wheels multi-mode closed-loop hydrostatic drive system based on independent driving wheel-type vehicle the most according to claim 1, it is characterised in that: described diverter is connected between the motor of both sides, is used for realizing assignment of traffic.
- A kind of many wheels multi-mode closed-loop hydrostatic drive system based on independent driving wheel-type vehicle the most according to claim 1, it is characterized in that: described fixed displacement motor one, fixed displacement motor two, fixed displacement motor three, fixed displacement motor four are respectively used to connect wheel, are mechanical energy by hydraulic energy transfer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610182490.0A CN105818679A (en) | 2016-03-28 | 2016-03-28 | Independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system |
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| CN201610182490.0A CN105818679A (en) | 2016-03-28 | 2016-03-28 | Independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system |
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| CN201610182490.0A Pending CN105818679A (en) | 2016-03-28 | 2016-03-28 | Independent drive wheeled vehicle-based multiwheel multimodal closed-loop hydrostatic drive system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122133A (en) * | 2016-08-24 | 2016-11-16 | 中煤科工集团西安研究院有限公司 | A kind of unit head multistage rotating speed hydraulic control speed control loop and method |
| CN106740085A (en) * | 2017-02-15 | 2017-05-31 | 内蒙古科技大学 | A kind of direct-driving electric driving wheel truck electrohydraulic control system with hydraulic accumulation energy |
| CN107725516A (en) * | 2017-08-30 | 2018-02-23 | 美通重工有限公司 | Aerial work platform walking driving hydraulic system |
| CN109263466A (en) * | 2018-08-29 | 2019-01-25 | 皇珈叉车(苏州)有限公司 | A kind of quantitative open type liquid drive system of cross-country scissor aerial work platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106122133A (en) * | 2016-08-24 | 2016-11-16 | 中煤科工集团西安研究院有限公司 | A kind of unit head multistage rotating speed hydraulic control speed control loop and method |
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| CN106740085A (en) * | 2017-02-15 | 2017-05-31 | 内蒙古科技大学 | A kind of direct-driving electric driving wheel truck electrohydraulic control system with hydraulic accumulation energy |
| CN106740085B (en) * | 2017-02-15 | 2018-12-11 | 内蒙古科技大学 | A kind of direct-driving electric driving wheel truck electrohydraulic control system with hydraulic accumulation energy |
| CN107725516A (en) * | 2017-08-30 | 2018-02-23 | 美通重工有限公司 | Aerial work platform walking driving hydraulic system |
| CN107725516B (en) * | 2017-08-30 | 2021-04-20 | 美通重工有限公司 | Walking driving hydraulic system of aerial work platform |
| CN109263466A (en) * | 2018-08-29 | 2019-01-25 | 皇珈叉车(苏州)有限公司 | A kind of quantitative open type liquid drive system of cross-country scissor aerial work platform |
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